106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
/* Ham Sandwich
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*
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* by sawce
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* In addition, as a special exception, the author gives permission to
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* link the code of this program with the Half-Life Game Engine ("HL
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* Engine") and Modified Game Libraries ("MODs") developed by Valve,
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* L.L.C ("Valve"). You must obey the GNU General Public License in all
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* respects for all of the code used other than the HL Engine and MODs
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* from Valve. If you modify this file, you may extend this exception
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* to your version of the file, but you are not obligated to do so. If
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* you do not wish to do so, delete this exception statement from your
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* version.
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*/
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// Calling virtual functions on binaries compiled with GCC 2.95
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// 2.95 and before stores the virtual table at the end of the
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// inheritable size of the base class.
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// I have no idea how it does it for multiple inheritance; i don't
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// really care. Everything I'm calling does it in single inheritence.
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// GCC doesn't put this on a register like MSVC does, so
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// just pass it like a normal parameter (the first one)
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// For GCC 3.3 compiled binaries, set the "size" parameter to 0
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#ifdef __linux__
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#ifndef VFUNC_GCC295_H
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#define VFUNC_GCC295_H
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inline void *GetVTableEntry(void *pThis, int ventry, int size)
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{
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char *pcThis=*(char **)&pThis;
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pcThis+=size;
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void **vtbl=*(void ***)pcThis;
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return vtbl[ventry];
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}
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// I only comment on the first call, because it's jut copy/paste after
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// the rest are compacted for copy/paste ease
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template <class PTypeA, class PTypeB, class PTypeC, class PTypeD>
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inline void VoidVCall4(void *pThis, int ventry, int size, PTypeA pa, PTypeB pb, PTypeC pc, PTypeD pd)
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{
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// First move up past the size of the class
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char *pcThis=*(char **)&pThis;
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pcThis+=size;
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void **vtbl=*(void ***)pcThis;
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// now points to the vtable of this object
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typedef void (*fptr)(void*,PTypeA,PTypeB,PTypeC,PTypeD);
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fptr function=reinterpret_cast<fptr>(vtbl[ventry]);
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function(pThis,pa,pb,pc,pd);
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};
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template <class RetType, class PTypeA, class PTypeB, class PTypeC, class PTypeD>
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inline RetType VCall4(void *pThis, int ventry, int size, PTypeA pa, PTypeB pb, PTypeC pc, PTypeD pd)
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{
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char *pcThis=*(char **)&pThis;
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pcThis+=size;
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int **vtbl=*(int ***)pcThis;
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typedef RetType (*fptr)(void*,PTypeA,PTypeB,PTypeC,PTypeD);
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fptr function=reinterpret_cast<fptr>(vtbl[ventry]);
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return function(pThis,pa,pb,pc,pd);
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};
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template <class PTypeA>
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inline void VoidVCall1(void *pThis, int ventry, int size, PTypeA pa)
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{
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char *pcThis=*(char **)&pThis;
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pcThis+=size;
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int **vtbl=*(int ***)pcThis;
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typedef void (*fptr)(void*,PTypeA);
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fptr function=reinterpret_cast<fptr>(vtbl[ventry]);
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function(pThis,pa);
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};
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template <class RetType, class PTypeA>
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inline RetType VCall1(void *pThis, int ventry, int size, PTypeA pa)
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{
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char *pcThis=*(char **)&pThis;
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pcThis+=size;
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int **vtbl=*(int ***)pcThis;
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typedef RetType (*fptr)(void*,PTypeA);
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fptr function=reinterpret_cast<fptr>(vtbl[ventry]);
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return function(pThis,pa);
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};
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#endif //VFUNC_GCC295_H
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#endif // __linux__
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